:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --info-color: #0dcaf0;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container-fluid {
    flex: 1;
}

/* Card hover effects */
.card {
    transition: transform 0.2s, box-shadow 0.2s;
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

/* Table styles */
.table thead th {
    background-color: var(--primary-color);
    color: white;
    border: none;
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(0,0,0,.02);
}

/* Form styles */
.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13,110,253,0.25);
}

/* Button styles */
.btn {
    border-radius: 5px;
    font-weight: 500;
    transition: all 0.3s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 10px rgba(0,0,0,0.2);
}

/* Alert styles */
.alert {
    border: none;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

/* Navbar styles */
.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-weight: bold;
    font-size: 1.5rem;
}

/* Dashboard cards */
.card .opacity-50 {
    opacity: 0.5;
}

/* Modal styles */
.modal-content {
    border: none;
    border-radius: 15px;
}

.modal-header {
    background-color: var(--primary-color);
    color: white;
    border-radius: 15px 15px 0 0;
}

.modal-header .btn-close {
    filter: brightness(0) invert(1);
}

/* DataTables customization */
.dataTables_wrapper .dataTables_paginate .paginate_button {
    border-radius: 5px !important;
    margin: 0 2px;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current {
    background: var(--primary-color) !important;
    color: white !important;
    border: none;
}

/* Responsive tables */
.table-responsive {
    border-radius: 10px;
    overflow: hidden;
}

/* Loading spinner */
.spinner {
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Price tag */
.price-tag {
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    color: white;
    padding: 5px 15px;
    border-radius: 25px;
    font-weight: bold;
}

/* Status badges */
.badge {
    padding: 8px 12px;
    font-weight: 500;
    border-radius: 20px;
}

/* Footer */
.footer {
    margin-top: auto;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px 0;
    margin-top: 50px;
}

/* Animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}